Publications by authors named "Kwadwo Mensah-Darkwa"
Carbon black, a nano-porous material usually derived from the pyrolysis of waste tyres possesses varied particle sizes and morphology making it a viable material for several engineering applications. However, the high tendency for CB to agglomerate remains a challenge. To address this, bio-templating has been employed to produce a nanostructured porous carbon electrode material for supercapacitor applications using diatomite as a template.
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- * A second-order quadratic model was found to accurately predict fluoride extraction, identifying key factors such as temperature, acid concentration, and leaching time, which significantly influence the extraction process.
- * The research concluded that the best extraction kinetics follow a diffusion through liquid film mechanism, with an optimum fluoride extraction rate of 87.49% achieved under specific conditions, providing a foundation for more efficient and sustainable industrial SPL treatment.
In this work, carbonization and subsequent activation procedures were adopted to synthesize waste shea butter shells into oxygen-rich interconnected porous activated carbon (SAC_x, x is the mass ratio of KOH used for activation). The SAC_1.5 electrode material showed outstanding electrochemical performance with high specific capacitance (286.
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- * MXenes can be easily combined with other materials, like oxides and polymers, enhancing their performance for various applications, particularly in environmental and energy storage uses.
- * This review focuses on the latest advancements in MXenes for electrochemical energy storage, detailing their synthesis, properties, and applications in supercapacitors and batteries while discussing future research directions.
Supercapacitors may be able to store more energy while maintaining fast charging times; however, they need low-cost and sophisticated electrode materials. Developing innovative and effective carbon-based electrode materials from naturally occurring chemical components is thus critical for supercapacitor development. In this context, biopolymer-derived porous carbon electrode materials for energy storage applications have gained considerable momentum due to their wide accessibility, high porosity, cost-effectiveness, low weight, biodegradability, and environmental friendliness.
View Article and Find Full Text PDFBackground: Underground miners can experience occupational health diseases due to exposure to particulate matter hazards.
Objectives: The aim of the present study was to examine occupational exposures of underground miners to dust and diesel particulate matter and to identify exposure groups with high potential to develop associated health effects due to the presence of dust and diesel particulate matter (DPM) hazards in an underground gold mine in Ghana.
Methods: Purposive sampling was employed using gravimetric air samplers over an 8-hour time weighted average period.